Controlled laboratory experiments at the U.S. Maritime Administration's Computer Aided Operations Research Facility (CAORF) at King's Point, N.Y. and at Liverpool Polytechnic in the United Kingdom have gathered convincing evidence showing that watch officers operate more efficiently and safely with Collision Avoidance Aid (CAA) devices. The Liverpool researchers classified the CAA into three basic genres--stored history, vector, and Predicted Area of Danger (PAD). All three systems use the ship's gyrocompass to derive own heading, and standard marine radar as their primary sensor to derive target azimuth and range data. Many of these systems have "predictive capability,"--the capability of determining the effects of a heading and/or speed alteration by own ship upon future relative positions. Systems with predictive capability require an additional datum, own ship's speed. Own speed is generally obtained from a good quality speed log such as an ultrasonic type. This article discusses the third genre, the PAD system used exclusively on the patented Sperry CAS.

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  • Corporate Authors:

    Compass Publications Incorporated

    1117 North 19th Street, Suite 1000
    Arlington, VA  United States  22209
  • Authors:
    • Riggs, R F
    • Ravenna, K
  • Publication Date: 1980-3

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Filing Info

  • Accession Number: 00310836
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 7 1980 12:00AM